Design study on very low Beta spoke cavity for China-ADS

Han, Li; Sha, Peng; Dai, JP; Huang, Heng; Wang, Qunyao

doi:10.1088/1674-1137/36/8/014

Cited by 9 publications

(2 citation statements)

References 5 publications

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“…According to the Maxwell's equations, the mechanical forces Fν on cavity walls and the stored energy W of the electromagnetic field are proportional to the square of the accelerating gradient. 2 ,…”

Section: Principle Of the Measurementmentioning

confidence: 99%

“…The proton beam peak current is above 10.03 mA and the output energy is 10.1 MeV. For the first time in the world, this injector uses 14 spoke superconducting radio frequency cavities with extremely low β(β = 0.12) [2,3], which are divided into two groups and installed into two cryomodules (CM1 and CM2), respectively. The main RF parameters of the Spoke012 cavities are listed in Table 1.…”

Section: Introductionmentioning

confidence: 99%

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Measurement of the transfer function for a spoke cavity of C-ADS Injector I

Huang¹,

Sun²,

Wang³

et al. 2017

Chinese Phys. C

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Abstract：The spoke cavities mounted in the China Accelerator Driven sub-critical System (C-ADS) have high quality factor(Q) and very small bandwidth, making them very sensitive to mechanical perturbations whether external or self-induced. The transfer function is used to characterize the response of the cavity eigen frequency to the perturbations. This paper describes a method to measure the transfer function of a spoke cavity. The measured Lorentz transfer function shows there are 206 Hz and 311 Hz mechanical eigenmodes excited by Lorentz force in the cavity of C-ADS, and the measured piezo fast tuner transfer function shows there are 12 mechanical eigenmodes from 0 to 500 Hz. According to these results, some effective measures have been taken to weaken the influence from helium pressure fluctuation, avoid mechanical resonances and improve the reliability of RF system.

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Section: Principle Of the Measurementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%